needed to run the notmuch test suite, at least until the checking for
prerequisites is improved.
+Full test coverage of the stashing feature in Emacs.
+
New command-line features
-------------------------
Text of the form "id:MSG-ID" in mails is now a clickable button that
opens a notmuch search for the given message id.
+Add keybinding ('c I') for stashing Message-ID's without an id: prefix
+
+ Reduces manual labour when stashing them for use outside notmuch.
+
Performance
-----------